ppmshift(1)shift lines of a portable pixmap left or right by a random amount

SYNOPSIS

ppmshift
shift
[ppmfile]

DESCRIPTION

Reads a portable pixmap as input. Shifts every row of image data to the
left or right by a certain amount. The 'shift' parameter determines by how
many pixels a row is to be shifted at most.

Another one of those effects I intended to use for MPEG tests.
Unfortunately, this program will not help me here - it creates too random
patterns to be used for animations. Still, it might give interesting
results on still images.

EXAMPLE

Check this out: Save your favourite model's picture from something like
alt.binaries.pictures.supermodels (ok, or from any other picture source),
convert it to ppm, and process it e.g. like this, assuming the picture is
800x600 pixels:
# take the upper half, and leave it like it is
pnmcut 0 0 800 300 cs.ppm >upper.ppm